Enhanced cycling stability of Li–O2 batteries by using a polyurethane/SiO2/glass fiber nanocomposite separator

Luo, Kun, Zhu, Guangbin, Zhao, Yuzhen, Luo, Zhihong, Liu, Terence, Zhang, Kui, Li, Yali and Scott, Keith (2018) Enhanced cycling stability of Li–O2 batteries by using a polyurethane/SiO2/glass fiber nanocomposite separator. Journal of Materials Chemistry A, 6 (17). pp. 7770-7776. ISSN 2050-7488

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Luo et al - Enhanced cycling stability of Li–O2 batteries AAM.pdf - Accepted Version

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Official URL: http://dx.doi.org/10.1039/c8ta00879e

Abstract

A considerable improvement in the cycle performance of aprotic Li–O2 batteries was achieved by using a polyurethane/SiO2 gel nanoparticles/glass fiber (PU/SiO2/GF) nanocomposite separator, where a persistent capability of 1000 mA h g−1 was maintained for at least 300 charge/discharge cycles in a DMSO electrolyte with 1 M LiClO4 and 0.05 M LiI. In comparison, the cell with a conventional GF separator in the same experimental setup only run for 60 cycles. SEM, XRD and FT-IR analyses indicate that the corrosion and dendritic growth of the Li anode were significantly inhibited during the charge/discharge cycling, and the eventual failure of the Li–O2 batteries was attributed to the cathode passivation caused by the accumulation of the discharge product, which blocked the transfer of oxygen and electrolyte to the MWNTs cathode.

Item Type: Article
Subjects: F200 Materials Science
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Terence Liu
Date Deposited: 05 Jul 2018 11:04
Last Modified: 26 Mar 2019 03:30
URI: http://nrl.northumbria.ac.uk/id/eprint/34775

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